ARCHIVED REPORTS_XR0012457 - Laserfiche WebLink

Home Browse Search

Quarterly Monitoring Report - Second Quarter 2001 ' Mel Bokides Petroleum, Inc. 501 W. Lodi Avenue, Lodi, California ' 1.0. INTRODUCTION ' At the request of Mr. Nicholas Bokides of Mel Bokides Petroleum, Inc., Advanced GeoEnvironmental, Inc. (AGE) has prepared this quarterly monitoring report for 501 W. Lodi Avenue, Lodi, California (site). The site setting is illustrated on Figure 1. Site structures and ' monitoring well locations are depicted on Figure 2. The scope of work was to monitor and sample six ground water monitoring wells on the site, and ' to sample and monitor the soil vapor extraction system on the site. The objective of the work was to monitor dissolved petroleum hydrocarbon concentrations in ground water, characterize ground water flow direction and gradient on the site and to assess the effectiveness of the soil vapor extraction unit'on the site. A summary of previous investigations at the site was included in the Work Plan for Site Assessment, Mel Bokides Petroleum, 501 West Lodi Avenue, Lodi, California, dated 15 May 1998, prepared by AGE. 2.0. PROCEDURES ' Field work was conducted and this report prepared in accordance with guidelines established by the Central Valley Regional Water Quality Control Board (CVRWQCB) and directives issued by the San Joaquin County Public Health Services - Environmental Health Division (PHS-EHD) for subsurface investigations and sampling of ground water monitoring wells at sites with underground storage tank (UST) system releases. 2.1. MONITORING WELL PURGE PROCEDURES On 07.June 2001 the depth to ground water in each monitoring well was measured to the nearest 0.01-foot utilizing a Solist water level meter. Ground water elevations in BMW-1 through BMW-5 ' (site wells) and MW-5 (off-site well) were then calculated by subtracting the measured depth to ground water from the surveyed casing elevations (Table 1). Ground water elevations were later plotted and contoured on a scaled site map (Figure 3). After water levels were measured approximately 37 gallons (a minimum of three casing-water ' volumes per well) of water were purged from wells BMW-1 and BMW-2 utilizing a Grundfos submersible pump and approximately 4 to 10.5 gallons of water were purged from the remaining wells with a disposal bailers. ' An ICM Model 52200 and Hydac water analyzers were utilized to monitor temperature, pH and Advanced CeoEnvironmental,Inc.